I do not have kids (only a little boy at heart!) and therefore I do not need to defend parents travelling with noisy kids/babies BUT your argument of FULL fare passengers should not put up with DISCOUNTED obnoxious kids/babies is flawed! It implied that obnoxious kids/babies travelling on full fare will have the right to make themself a nuisance to the other fellow passengers BUT not the ones paying discounted price!
In my mind no passengers, young or old, full or discounted fares should disturb their fellow passengers unduly. I certainly do like to be made a victim on board a plane.
May be it is time rename this thread to nuisanse passengers!!!